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EP2202438B1 - Pipe coupling assembly wtih a protective ring - Google Patents

Pipe coupling assembly wtih a protective ring Download PDF

Info

Publication number
EP2202438B1
EP2202438B1 EP10160204.3A EP10160204A EP2202438B1 EP 2202438 B1 EP2202438 B1 EP 2202438B1 EP 10160204 A EP10160204 A EP 10160204A EP 2202438 B1 EP2202438 B1 EP 2202438B1
Authority
EP
European Patent Office
Prior art keywords
protective ring
area
ring
coupling assembly
coupling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10160204.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2202438A3 (en
EP2202438A2 (en
Inventor
Thomas Kilpatrick Mclaughlin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Oilwell Varco LP
Original Assignee
National Oilwell Varco LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US11/528,702 external-priority patent/US20080073905A1/en
Priority claimed from US11/540,939 external-priority patent/US7731246B2/en
Application filed by National Oilwell Varco LP filed Critical National Oilwell Varco LP
Priority to PL10160204T priority Critical patent/PL2202438T3/pl
Publication of EP2202438A2 publication Critical patent/EP2202438A2/en
Publication of EP2202438A3 publication Critical patent/EP2202438A3/en
Application granted granted Critical
Publication of EP2202438B1 publication Critical patent/EP2202438B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
    • F16L58/182—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for screw-threaded joints

Definitions

  • the present invention relates to a protective ring or gasket for use in a coupling assembly, to a coupling assembly comprising the protective ring, and to a method of coupling tubulars together using the coupling assembly.
  • Certain typical multiple walled pipe e.g. a lined steel pipe
  • the inner wall is a liner tube made of a corrosion resistant material that serves as a conductor for the corrosive fluid, and an outer wall or pipe that is designed to provide strength to withstand the internal pressures of the corrosive fluid, as well as external forces such as external pressure, mechanical loading, etc.
  • the length of such double walled pipes due to conditions to which the pipes are subjected on site.
  • each joint of pipe is usually about 7.32-13.41m (24-44 feet) long while the tubing or casing string itself may be thousands of feet long. Accordingly, and as is well known in making up such tubing or casing string, successive joints of tubing/casing are connected together using a coupling (or coupling assembly) until the desired length of string is achieved. Similarly in pipelines successive pieces of pipe are joined by couplings.
  • the coupling comprises an annular body for placement between and to which two tubulars may be connected.
  • the annular body has a thread on its interior surface for receiving the thread on the end of the each of the tubulars.
  • An annular gasket is positioned substantially centrally within and co-axial with the annular body. In use, each tubular comes into abutment with one side of the annular gasket as it is screwed into the annular body.
  • An example of such a coupling assembly is shown in US-A-5 470 111 .
  • US-A-4,875,713 discloses a generic coupling comprising a collar for receiving internally coated threaded tubings or casings, the coupling having an integral locking ring and a seal ring of resilient material having an annular recess for receiving the integral locking ring.
  • the seal ring comprises radial apertures to allow for escape of gases which may permeate through the resilient material and pressurize the space between the outer diameter of the seal ring and the internal face of the collar. The radial aperture will tend to close, but be forced open when pressure differential builds to allow pressure equalization across the seal ring.
  • US-A-1,889,868 discloses a pipe coupling used between joints of drill pipe in drilling operations, the coupling having two threaded joints threaded therein.
  • a sleeve is arranged within the coupling member between ends of the drill pipe.
  • the ends of the joints of drill pipe each abut copper seal rings arranged in opposing end rings with spring members linking them to a heavy central body of the sleeve.
  • the spring member has rubber filler members thereabout to frictionally engage the coupling member to inhibit movement therebetween.
  • the rubber filler members extrude in an annular space between the end rings and the coupling member (10) upon the spring members having pressure applied thereto.
  • a set screw is used to inhibit rotation between the coupling and the sleeve.
  • a coupling assembly system comprising a coupling body of generally cylindrical shape with a channel therethrough, each end of said coupling body having a thread for threaded mating with a tubular so that the coupling assembly may provide a fluid connection between two tubulars, a protective ring comprising a ring body for positioning adjacent an interior wall of said coupling body between the two ends thereof and located for contact by said two tubulars, said ring body being generally cylindrical having an exterior surface and an interior surface and a ring channel therethrough, said protective ring comprising at least one concave area extending around at least a part of the circumference of said exterior of said ring body and at least one opening in at least one of the exterior and interior surfaces of said ring body characterised in that said protective ring has at least one further concave area on said interior surface of said ring body, such that, upon the tubulars being threaded into said coupling body, ends of the tubulars compress the protective ring urging the protective ring against the
  • the at least one opening is in the interior surface.
  • the at least one opening is in the exterior surface.
  • the at least one opening is at least one recess.
  • the recess further comprises an energizing member arranged in the at least one recess.
  • the at least one concave area extends around substantially the whole of the circumference of the ring body.
  • the at least one concave area in the exterior surface comprises three spaced-apart areas, and the at least one concave area in the interior surface is two spaced-apart areas.
  • the protective ring further comprises: a plurality of energizing members in the protective ring, the three spaced-apart areas on the ring body's exterior comprising a first area, a second area, and a third area, a first energizing member of the plurality of energizing members located between the first area and the second area, a second energizing member of the plurality of energizing members located between the second area and the third area, the two spaced-apart areas on the ring body's interior comprising a fourth area and a fifth area, a third energizing member of the plurality of energizing members located between the fourth area and the fifth area, the protective ring having a first end and a second end, a fourth energizing member of the plurality of
  • the coupling assembly system further comprises the step of compressing the protective ring closes the opening, the ring body changing shape without a substantial change in volume.
  • the at least one opening is of sufficient size such that, when compressed between the two tubulars the ring body is inhibited from significant expansion into a flow path defined by the coupling assembly and the two tubulars.
  • such a protective ring has two or more energizing members; and in one particular aspect such a protective ring has three spaced-apart energizing members located in recesses adjacent openings in the protective ring that provide for controlled compression of the protective ring and holding of the protective ring in position with respect to the coupling's interior wall. In another aspect there are five energizing members, two positioned in the protective ring adjacent an inner wall of a coupling member and three positioned in an inner wall of the protective ring.
  • Any protective ring according to the present invention may have one, two, three, four, five or more concave areas on the protective ring, on the protective ring's exterior and/or on the protective ring's interior to enhance directed controlled energizing of the protective ring into contact with a coupling member.
  • a protective ring has three concave portions on the protective ring's exterior and two concave portions on the protective ring's interior.
  • such a protective ring (with one - five or more concave areas) may have one - five or more energizing members.
  • an energizing member is located between two concave areas.
  • a coupling assembly 10 has a coupling member 20 which is a generally cylindrical hollow member with interiorly threaded spaced-apart ends 22, 24 and an interior wall 26.
  • Two tubulars 32, 34 are threadedly connected to respective ends 22, 24 of the coupling member.
  • a protective ring 40 (shown schematically) which is any protective ring.
  • the tubulars 32, 34 have a liner 36 which may be any known tubular liner.
  • the protective ring 40 has one, two, three, four, five or more (one shown) energizing member 42.
  • a recess, slit, or opening 44 leads from an exterior of the protective ring 40 to the energizing member(s) 42 which allow movement (e.g. axial movement of the protective ring) when compressive forces are applied to the protective ring without a change in volume of the protective ring but with controlled change in shape of the protective ring.
  • Fig. 1B is a top (or bottom) view of one embodiments 40a of a protective ring 40.
  • Fig. 1C is a top (or bottom) view of one embodiment 42a of a protective ring 42.
  • the protective rings and energizing members of Figs. 2A, 2E and 3A are, similarly, items which are generally circular.
  • a coupling assembly 100 has a protective ring 140 held in compression between the pin ends 136, 138 of the pipes 132, 134. Each pin end 136, 138 is threadedly secured in a respective end 122, 124 of a coupling member 120.
  • the protective ring 140 has three spaced-apart openings 144a, 144b, and 144c, each of which extends interiorly from an exterior of the protective ring 140 and extends to an interior space which contains an energizing member 142a, 142b, 142c, respectively. Any energizing member shown herein may have any suitable cross-section shape, including but not limited to, those shown in Fig.
  • 2E shapes as follows: 142e, circular; 142f, square; 142g, hexagonal; 142h, triangular; 142i, trapezoidal; 142j, oval; 142k, teardrop; 1421, rectangular; 142m, teardrop; 142p, barrel).
  • Each pin end 136, 138 has an outer end bevel or taper 136a, 138a, respectively. Edge portions 146, 147 of the protective ring 140 are squeezed between an interior wall 126 of the coupling member 120 and the bevelled pin ends, thus assisting in securing the protective ring 140 in place adjacent the interior wall 126 of the coupling member 120.
  • all energizing members of a protective ring (any disclosed herein) disclosed herein to be of the same or of different hardness.
  • the two energizing members 142a, 142c are of the same hardness and the energizing member 142b is of a material harder than the material of the energizing members 142a, 142c.
  • the energizing members 142a, 142c are made of a resilient elastomeric material, e.g., but not limited to, nitrile or butile; in certain aspects the members 142a, 142c with a hardness of about 70 durometer and the member 142b with a hardness of about 90 durometer.
  • Any protective ring disclosed herein may have energizing members located further interiorly than other energizing members and of a hardness less than the other energizing members (e.g. other energizing members at an exterior wall of a protective ring).
  • the protective ring 140 extends around the entire inner circumference of the coupling member 120 and the energizing members 142a, 142b, and 142c (and their corresponding openings 144a, 144b, 144c) extend around (and within) the entire circumference of the protective ring 140.
  • Fig. 3A shows a protective ring 200 (e.g. usable in the coupling assemblies of Figs. 1A and 2A ).
  • a body 202 of the protective ring 200 is made of compressible anti-corrosive material, e.g. elastomeric resilient material, polytetrafluoroethylene (“PTFE”), or a combination of elastomer and PTFE.
  • PTFE polytetrafluoroethylene
  • Energizing members 231, 232, 233 are located within the interior spaces 221, 222, 223, respectively.
  • the protective ring 200 has outer edges or "teeth" 204, 205.
  • the openings 211, 212, 213, the spaces 221, 222, 223 and the energizing members 231, 232, 233 extend around the entire generally cylindrical body 202 (which is like the protective rings 40 and 140 in general hollow cylindrical shape although only part of the protective ring 200 is shown in Fig. 3A ).
  • the body 202 has a circumferential indentation 206 or concave area therearound.
  • the protective ring 200 is positioned adjacent and installed inside a coupling member 240 (shown partially - shaped generally cylindrically as the coupling members 20 and 120 described above) having internally threaded ends 242, 244 for threadedly mating with externally threaded ends (e.g. the ends 252, 254 of pipes 262, 264, Fig. 3E ).
  • a coupling member 240 shown partially - shaped generally cylindrically as the coupling members 20 and 120 described above
  • internally threaded ends 242, 244 for threadedly mating with externally threaded ends (e.g. the ends 252, 254 of pipes 262, 264, Fig. 3E ).
  • the protective ring 200 is being compressed (indicated by arrows. C1, C2), e.g. by pin ends of two tubulars to be connected together by the coupling 240. Since energizing members 231 and 233 are not as hard as the energizing member 232, the energizing members 231 and 233 move under compression before the energizing member 232, thus the protective ring 200 begins to move outwardly (toward the coupling member 240 as shown in Fig. 3C ). The openings 211 and 213 begin to restrict and close. Then the opening 212 begins to restrict and close.
  • the openings 211 - 213 provide space so that the protective ring 200 does not significantly expand into the flow path of the coupling member 240.
  • the indentation 206 also facilitates the outward movement (toward the coupling member interior wall) of the protective ring 200 and provides an area or a void for protective ring material to flow to when the protective ring is compressing.
  • Fig. 3D illustrates the protective ring 200 fully compressed with the openings 211 - 213 closed and the energizing members 231 - 233 compressed (the members 231 - 233 have changed shape).
  • the protective ring 200 has been forced against an interior wall 246 of the coupling member and, due to the openings 211 - 213, the indentation 206, and/or the entrapment of the two teeth 204, 205, the protective ring 200 has been biased outwardly and prevented from bowing inwardly so that the protective ring 200 is pressed up against the interior wall 246 along the length of the protective ring 200.
  • the energizing members 231 - 233 are pushing the protective ring 200 against the coupling's interior wall.
  • the edges or teeth 204, 205 of the protective ring 200 have been trapped between tapered ends of the tubulars 262, 264 and part of the interior wall 246 of the coupling member 240, thus facilitating maintenance of the protective ring 200 in position to protect the interior wall 246.
  • oil country tubular goods are made according to certain length tolerances, e.g. 3,18 mm (one-eighth inchh) plus or minus.
  • this manufacturing tolerance can be accommodated.
  • each opening e.g. 211 - 213 is 16,8 mm (0.66 inches) for a total of about 5,08 mm (0.200 inches) (actually 5,03 mm (0.198 inches)) and the energizing members themselves (e.g.
  • members 231 - 233) can be squeezed a total of another 1,27 mm (0.050 inches), a total of about 6,35 mm (0.250 inches) of compression is available, i.e., an amount equal to about the manufactuprotective ring tolerance of 3,18 mm (one-eighth inch) plus or minus (a total of 6,35 mm (one-fourth inch)).
  • Fig. 4A shows a protective ring 300 according to the present invention useful in protecting a coupling member (e.g. a coupling member as in Figs. 1A , 2A , 3B or 3E ).
  • the protective ring 300 (only half is shown) has a body 302 with a first end 304 and a second end 306. Each end, optionally, has a projecting edge or tooth 314, 316, respectively which extends around the entire circumference of its respective circular end.
  • a plurality of concave areas extend around the protective ring's circumference areas 321, 322, 323 on the protective ring's exterior surface and areas 324, 325 on the protective ring's interior surface.
  • the energizing members are, in one aspect, omitted. Any one, some, or all of the recesses 341 - 345 may be omitted.
  • edges or teeth 314, 316 can be trapped as described above for the edges 204, 205.
  • each energizing member 343, 344, 345 can be located opposite a concave area 321, 322, 323 (along with other forces) respectively, and, upon energizing force the concave areas outwardly.
  • Fig. 4B illustrates a protective ring 350 of the present invention, like the protective ring 300, but with only one energizing member 354 on an interior surface of a protective ring body 352.
  • the energizing member 354 is in a recess 356 which is positioned between two concave areas 351. These concave areas 351 are on the body's exterior surface and the body 352 has two end edges or teeth 353, 359.
  • Fig. 4C shows a protective ring 360, like the protective ring 350, but without the concave areas 351.
  • a body 362 has three concave areas 363 on the body's exterior surface.
  • any energizing member or members disclosed herein can be added to the protective ring 360.
  • Fig. 4D shows a protective ring 370, like the protective ring 350, but without energizing members.
  • a body 372 has two concave areas 373 on the body's interior surface.
  • ends of the body 362 have edges 374.
  • any energizing member or members disclosed herein can be added to the protective ring 370.
  • Fig. 5A shows a protective ring 400 which is a generally cylindrical hollow member (only half shown).
  • the protective ring 400 has a body 402 with a concave area 404 on its exterior surface.
  • the concave area 404 extends around the body of the protective ring.
  • the concave area(s) may be intermittent, a single pocket, or a series of spaced-apart distinct pockets. Ends of the body 402, optionally, have edges 406.
  • Fig. 5B shows a protective ring 410 which is like the protective ring 410 but which includes a recess 412 with an energizing member 416 therein.
  • the protective ring 410 has a body 418 with a concave area 415 and with optional end edges 419.
  • Fig. 5C shows a protective ring 430 with a body 432 having optional end edges 433.
  • a concave area 434 is on the body's exterior surface.
  • Fig. 5D shows a protective ring 440 with a body 442.
  • the body 442 has a concave area 443 on its exterior and a recess 444 on its interior.
  • the energizing member may extend only so far as the area or pocket(s) or it may still extend uninterrupted around the protective ring's circumference.
  • Fig. 6A illustrates a protective ring 600 with a plurality of spaced-apart concave areas 604 in a body 602.
  • energizing members 606 are adjacent each pocket.
  • an energizing member 608 can extend adjacent all pockets 604a in a body 602a.
  • the protective ring and coupling assembly of the present invention may find application in various fields including, but not limited to, coupling any clad or lined tubulars including oil and gas well tubing and casing, piping in chemical and other plants, oil and gas pipelines, etc.

Landscapes

  • General Engineering & Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Joints With Sleeves (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Earth Drilling (AREA)
  • Buffer Packaging (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)
  • Mechanical Operated Clutches (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Pens And Brushes (AREA)
EP10160204.3A 2006-09-27 2007-03-21 Pipe coupling assembly wtih a protective ring Active EP2202438B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10160204T PL2202438T3 (pl) 2006-09-27 2007-03-21 Zespół złączki rurowej z pierścieniem zabezpieczającym

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11/528,702 US20080073905A1 (en) 2006-09-27 2006-09-27 Pipe coupling system
US11/540,939 US7731246B2 (en) 2006-09-29 2006-09-29 Pipe coupling system
EP07733561.0A EP2069672B1 (en) 2006-09-27 2007-03-21 Coupling assembly and protective ring therefor

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP07733561.0A Division-Into EP2069672B1 (en) 2006-09-27 2007-03-21 Coupling assembly and protective ring therefor
EP07733561.0A Division EP2069672B1 (en) 2006-09-27 2007-03-21 Coupling assembly and protective ring therefor
EP07733561.0 Division 2007-03-21

Publications (3)

Publication Number Publication Date
EP2202438A2 EP2202438A2 (en) 2010-06-30
EP2202438A3 EP2202438A3 (en) 2010-08-04
EP2202438B1 true EP2202438B1 (en) 2014-03-05

Family

ID=38068946

Family Applications (3)

Application Number Title Priority Date Filing Date
EP07733561.0A Active EP2069672B1 (en) 2006-09-27 2007-03-21 Coupling assembly and protective ring therefor
EP10160204.3A Active EP2202438B1 (en) 2006-09-27 2007-03-21 Pipe coupling assembly wtih a protective ring
EP10160197A Active EP2202437B1 (en) 2006-09-27 2007-03-21 Pipe coupling assembly and protective ring therefor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07733561.0A Active EP2069672B1 (en) 2006-09-27 2007-03-21 Coupling assembly and protective ring therefor

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP10160197A Active EP2202437B1 (en) 2006-09-27 2007-03-21 Pipe coupling assembly and protective ring therefor

Country Status (12)

Country Link
EP (3) EP2069672B1 (ru)
CN (1) CN102506248B (ru)
AT (1) ATE533001T1 (ru)
AU (1) AU2007301689B2 (ru)
BR (3) BR122018015575B1 (ru)
CA (1) CA2664737C (ru)
EA (2) EA018172B1 (ru)
MX (1) MX2009003262A (ru)
NO (2) NO340193B1 (ru)
PL (2) PL2069672T3 (ru)
SG (2) SG175560A1 (ru)
WO (1) WO2008038034A1 (ru)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA018172B1 (ru) 2006-09-27 2013-06-28 НЭШНЛ ОЙЛВЕЛЛ ВАРКО, Эл.Пи. Соединительный узел и защитное кольцо для него
GB2496882A (en) * 2011-11-24 2013-05-29 Plumb Partners Group Ltd Pipe connector for connecting two axial pipe ends
GB2502958B (en) * 2012-06-11 2019-04-24 Halliburton Energy Services Inc Improvements relating to core barrel outer tubes
GB2524522B (en) 2014-03-25 2020-03-25 Nat Oilwell Varco Lp Coupling assembly and protective ring therefor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1889868A (en) * 1930-07-21 1932-12-06 Gustavus A Montgomery Double box rotary tool joint

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US1889869A (en) * 1930-08-02 1932-12-06 Gustavus A Montgomery Tube coupling
US2487241A (en) * 1947-01-16 1949-11-08 Lewis D Hilton Thread seal and buffer gasket for pipe couplings
GB641125A (en) * 1948-02-09 1950-08-02 Chiksan Co Improvements in or relating to swivel joints for pipes and tubes
US2805872A (en) * 1954-12-03 1957-09-10 Rice Engineering And Operating Lined pipe coupling with internally flush gasket
DE2048569C2 (de) * 1970-10-02 1983-05-19 Kempchen & Co Gmbh, 4200 Oberhausen Dichtung
GB2032033B (en) * 1978-10-04 1983-02-02 Oakes Ltd Joining of pipes
US4875713A (en) 1985-09-24 1989-10-24 Kenneth J. Carstensen Internally coated tubular system
US4679831A (en) * 1986-06-13 1987-07-14 Kielminski William P Pipe coupling connection sealing apparatus
US4856828A (en) * 1987-12-08 1989-08-15 Tuboscope Inc. Coupling assembly for tubular articles
WO1994011664A1 (en) * 1992-11-13 1994-05-26 Mobil Oil Corporation Corrosion resistant connection for use with tubular members
US5470111A (en) 1994-08-12 1995-11-28 Tuboscope Vetco International, Inc. Plastic coating thread and coupling assembly
DE69919908T2 (de) * 1999-06-29 2005-09-01 Ampo, S. Coop. Superelastiche dichtung für flüssiggasbearbeitungsanlage
US6179002B1 (en) * 2000-01-06 2001-01-30 National Coupling Company, Inc. Hydraulic coupling with pressure-energized dovetail seal
US7575256B2 (en) * 2003-08-06 2009-08-18 National Coupling Company, Inc. Bore liner for undersea hydraulic coupling
US7303194B2 (en) * 2003-10-20 2007-12-04 National Coupling Company, Inc. Seal retainer with pressure energized metal seal members for undersea hydraulic coupling
EA018172B1 (ru) 2006-09-27 2013-06-28 НЭШНЛ ОЙЛВЕЛЛ ВАРКО, Эл.Пи. Соединительный узел и защитное кольцо для него

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1889868A (en) * 1930-07-21 1932-12-06 Gustavus A Montgomery Double box rotary tool joint

Also Published As

Publication number Publication date
BR122018015577B1 (pt) 2019-10-01
BRPI0715283B1 (pt) 2018-09-18
EP2202438A3 (en) 2010-08-04
NO340193B1 (no) 2017-03-20
SG175560A1 (en) 2011-11-28
CN102506248B (zh) 2014-12-24
EA200970321A1 (ru) 2009-10-30
EP2202438A2 (en) 2010-06-30
BRPI0715283A2 (pt) 2013-01-01
PL2202438T3 (pl) 2014-08-29
EP2069672A1 (en) 2009-06-17
EP2069672B1 (en) 2014-03-12
NO20170081A1 (no) 2009-06-23
BR122018015575B1 (pt) 2019-10-01
AU2007301689A1 (en) 2008-04-03
EA018172B1 (ru) 2013-06-28
CA2664737A1 (en) 2008-04-03
SG174839A1 (en) 2011-10-28
PL2069672T3 (pl) 2014-08-29
CA2664737C (en) 2013-07-30
EA019186B1 (ru) 2014-01-30
AU2007301689B2 (en) 2012-11-29
EP2202437A2 (en) 2010-06-30
EP2202437A3 (en) 2010-08-04
WO2008038034A1 (en) 2008-04-03
EP2202437B1 (en) 2011-11-09
CN102506248A (zh) 2012-06-20
ATE533001T1 (de) 2011-11-15
NO20091310L (no) 2009-06-23
MX2009003262A (es) 2009-04-08
EA201100477A1 (ru) 2011-10-31

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